Want to comment without revealing your identity? That's easy.
One way is to use the following username/password combination: firstname.lastname@example.org/district299reader.
Another way is to create your own identity through a free hotmail, yahoo, or gmail address -- call it Angry AP, or Rookie English Teacher, or whatever you want.
Here's the link to sign up for a Google (gmail) account. It's free. You can come up with any name you want.